Fault Tree is one of the traditional and conventional approaches used in fault diagnosis. By
identifying combinations of faults in a logical framework it’s possible to define the structure
of the fault tree. The same go with Bayesian networks, but the difference of these probabilistic
tools is in their ability to reasoning under uncertainty. Some typical constraints to the
fault diagnosis have been eliminated by the conversion to a Bayesian network. This paper
shows that information processing has become simple and easy through the use of Bayesian
networks. The study presented showed that updating knowledge and exploiting new knowledge
does not complicate calculations. The contribution is the structural approach of faults
diagnosis of turbo compressor qualitatively and quantitatively, the most likely faults are
defined in descending order. The approach presented in this paper has been successfully
applied to turbo compressor, which represent vital equipment in petrochemical plant.
This paper describes the use of new methods of detecting faults in medium-voltage overhead lines built of covered conductors. The methods mainly address such faults as falling of a conductor, contacting a conductor with a tree branch, or falling a tree branch across three phases of a medium-voltage conductor. These faults cannot be detected by current digital relay protection systems. Therefore, a new system that can detect the above mentioned faults was developed. After having tested its operation, the system has already been implemented to protect mediumvoltage overhead lines built of covered conductors.